Lexicon 960L owner manual RearRoll, RearRvb, RShape, RSpread, RtHicut, RvbLvl, RvbPreD, Shelf

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960L Owner’s MaunalUsing The Reverb Program

Parameters Used in the 960L Algorithms, Continued

RearRoll

Rear Rolloff (Surround algorithms only). Like Rolloff in Stereo, this controls the cutoff frequency

 

of a 6dB per octave low-pass filter at the output of all processing, but affects the rear (LS and

 

RS) channels only. A separate parameter, FrRoll, controls the rolloff for the front (LF, C, and RF)

 

channels.

RearRvb

Rear Reverb Level (Surround algorithms only.). Like RvbLvl in Stereo, this controls the level of

 

the reverberant tail, but only for the LS and RS outputs. This allows their levels to be set relative

 

to the early reflection levels and the other reverb tails. RvbLvl is a master control for CtrRvb,

 

FrRvb and RearRvb.

RShape

Rear Shape (Ambient Chamber algorithm only) sets the contour of the initial reverberant-energy

 

growth for the rear channels. Low values produce a very rapid onset, as you’d find in a small

 

chamber. With larger values, the reverberation "blooms" over a few hundred msec, much as it

 

would in a good, Romantic-era concert hall, and the listener’s perceived position moves farther

 

back into the hall. See also Contour, Rspread, Shape, and Spread.

RSpread

Rear Spread (Ambient Chamber algorithm only) works with RShape to control the profile of

 

initial reverberant-energy growth for the rear channels, stretching or compressing this contour in

 

time to make reflections closer together or further apart. With complex material, it may be

 

advisable to use a moderately high value for Shape and a moderately low one for Spread to

 

create a bit of space around the original signal. See also Contour, RShape, Shape, and Spread.

RtHicut

Reverberation Time High Cut. In real rooms, the timbre of the reverberant tail becomes darker

 

over time due to the air’s absorption of high-frequency sound energy. This control models that

 

behavior, though over a much wider frequency range. When you set the cutoff to very low

 

frequencies, the duration of the reverb will be much shorter than the value shown by MidRT.

RvbLvl

Reverberation Level controls the level of the Reverberant tail, allowing its level to be set relative

 

to the early reflection levels. It is normally set to Full, but may be reduced for effects where pre-

 

echoes should dominate. In surround algorithms, this is a master control for CtrRvb, FrRvb and

 

RearRvb.

RvbPreD

Reverb PreDelay sets the number of milliseconds between a sound and the onset of the

 

reverberations it excites, equivalent to the time of first reflection. In the algorithms that include

 

the Shape and Spread controls it is better to extend the time period before reverberant decay

 

using Shape and Spread. In general we recommend leaving the Reverb PreDelay set at the

 

preset value.

Shape

Shape works with Spread to control the profile of initial reverberant-energy growth. Shape sets

 

the envelope of the energy build-up and Spread stretches or compresses this contour in time.

 

Low values of Shape produce a very rapid onset, as you would find in a small chamber. With

 

larger values, the reverberation "blooms" over a few hundred milliseconds, much as it would in a

 

good, Romantic-era concert hall. Large values of Spread and Shape can create "inverse" effects

 

(see note under Reverse algorithm).

Shelf

Shelf (Random Hall only) controls a shelving low-pass on the reverb output. It modifies the low-

 

pass characteristic of the rolloff control, turning it into a shelving filter. Both the pre-echoes and

 

the reverberation are affected. For example, if Shelf is set to –6 dB, frequencies below

 

approximately Roll / 2 will be boosted by 3.5 dB, while above approximately Roll / 2 response will

 

be flat. For realistic musical acoustics, Shelf should be set between +12 and –6 dB and Roll

 

should be set between 700 Hz and 1.5 kHz. While this control can occasionally be useful to

 

increase the apparent low frequency content of the returns, it does so at the expense of

 

eliminating the overall rolloff characteristic that typically begins around 2kHz. Thus it is probably

 

best to leave Shelf set to zero. If more LF is desired in the returns, use console equalization to

 

increase the low frequency content by ~3dB below 200Hz.

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Contents 960L. Digital Effects System Important Safety Instructions Table Of Contents Table Of Contents Introduction Title of SectionMainframe Description Rear PanelAbout the 960L Unpacking the 960LClock Card Midi Connectors Five-pin DIN female Remote-Control ConnectorsMains Power Switch IEC Power ConnectorStandby Switch and Indicator Front PanelFloppy Drive ThumbscrewsBehind the Front Panel DSP-Card SlotsCPU Card Installation MountingVentilation LocationDigital Audio Connections Midi ConnectionsWordclock Connections LARC2 Remote Navigating Typical Display ScreensLARC2 Remote About the LARC2Unpacking the Larc LARC2 Control Surface LARC2 Control SurfaceGetting What You Want LARC2 ConnectionsNavigating Typical Display Screens A typical display screenMode Faders Joystick About the Faders and JoystickAudio Indicators Fine AdjustLexicon Button Basic Operation AN Overview of the ControlsBasic Operation An Overview of the ControlsSetup Control Mode Quick Guide to Operation960L Owner’s MaunalBasic Operations Quick Guide to Operation Machine Selection Program LoadingEditing a Program or Register Storing Your EditsName screen Info screens are similar Control Mode CLOCKS, Configuration Operations in DetailLoading Programs and Registers Loading ProgramsLoading Registers Alternative Loading TechniquesProgramming Machines Control Mode Clocks, Configuration, and System Screens WordclockInput, Output, and Machine Configuration Locked and unlocked wordclock960L Owner’s Maunal Operations in Detail 44.1/48kHz Dual machines 5-in and 2-in Output Assignment Left Right Center Unused Surround Surround Analog and Digital I/O System ScreenFine Adjust EditingEditing Algorithms Editing With the FadersEditing with the Joystick Quick Comparisons via the Lexicon ButtonEditing Inputs and Outputs Input PanningOutput Panning Setting Levels 960L Surround Panning RulesAvoiding Overload Using the Edit Algorithm Screen V-Page and Parameter ReassignmentFrom the Edit Algorithm, Inputs, Outputs Options screen 22 Edit V-Page screen programming the joystick Storing and Labeling Your Edits StoringNaming and Annotating 25 a Register Info Options Enabled Organizing Your RegistersMachine Mode Using the Floppy DriveCD-ROM Edit Tools for RegistersUsing the Reverb Programs Using the Reverb Programs Reverberation and RealityUsing The Reverb Program Lexicon, Inc Reverberation and Reality Msec Sound in Space a Short History of Stereo and Surround Algorithms Random HallSurround Hall ChamberPlate & Surround Plate Ambience & Surround AmbienceAmbient Chamber Reverse & Surround ReverseInverse Parameters Used in the 960L Algorithms Using The Reverb ProgramLexicon, Inc FbckL FbckRFbckLF FbckLSLvLL LvRRLvLR LvRL LvLFLFRearRoll RearRvbRShape RSpreadSize SlopeSpin SpreadMidi Nomenclature Midi Channel AllocationChannel Usage Description Card Configuration Bank and Program MappingBank Description Program # DescriptionMidi Sysex Incoming Inquiry Midi Byte Description960Ls response Midi Implementation Chart Specifications Specifications Connector 48K Rack Units96K Factory ProgramsLARC2 User Interface Appendix Appendix Program Descriptions HallsAppendix B1 P4 B3 P4 B6 P2 B7 P2 B9 P9 B11 P5 Empty Mini Chamber Similar to Snare Chamber, but even smaller Lg Brite Room Random Hall Simply large and bright Echo Plate Like Flat Plate, but with echoes Stereo Bank Kitchen Chamber Can you find your disposal sound effect?
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